Portable combination power tool



Feb. 2, 1960 c. J. ROZELL 2,923,330

PORTABLE COMBINATION POWER TOOL Filed Oct. 13, 1958 2 Sheets-Sheet 1 Q X*m 64 I 3 5 I 46 2 42 4+. 1 L I a I 4a 2e 3 iz 30 7 I 34 3a INVENTORFeb. 2, 1960 c. J. ROZELL PORTABLE COMBINATION POWER TOOL 2 Sheets-Sheet2 Filed Oct. 13, 1958 (60%.? /?oze// INVENTOR PORTABLE COMBINATION POWERTOOL Charles J. Rozell, Wabash, Ind. Application October 13, 1958,Serial No. 766,957

4 Claims. (Cl. 144-4 7 This invention relates to power tools and moreparticularly to a completely portable combination work shop.

It is an object of the present invention to provide a portable work unithaving a plurality of various power tools that may be selectively usedfor accomplishing different results during the repair and maintenance ofvarious types of equipment.

Another object of the present invention is to provide a portable workshop in the form of a substantially rigid main frame that is supportedupon wheel and axle assembly for movement from one location to anotherin a simple and efficient manner.

A further object of the present invention is to provide a portable workshop of the above type having a single motive power drive means forselectively energizing any one of a number of different power tools forperforming different tasks whenever required.

Other objects of the invention are to provide a portable work shopbearing the above objects in mind which is of simple construction, has aminimum number of parts, is inexpensive to manufacture and efiicient inoperation.

For other objects and for a better understanding of the invention,reference may be had to the following detailed description taken inconjunction with the accompanying drawing, in which:

Figure 1 is a side elevational view of a portable work shop made inaccordance with the present invention with a drill press forming a partthereof in operative use;

Figure 2 is a top plan view of the apparatus shown in Figure 1;

Figure 3 is an end elevational view of the apparatus shown in Figure 1;

Figure 4 (Sheet 1) is an opposite end view similar to Figure 3;

Figure 5 is an enlarged fragmentary plan view taken along line 55 ofFigure 4;

Figure 6 is an enlarged fragmentary cross sectional view taken along 66of Figure 1; and

Figure 7 (Sheet 1) is an enlar ed fragmentary cross sectional view takenalong line 7--7 of Figure 3.

Referring now more in detail to the drawing, a portable work shop 10made in accordance with the present invention is shown to include a mainframe 12 that is supported upon an underframe 14 that is rollablycarried by a pair of wheels 16. The opposite end of the main frame 12includes depending support bars 18 upon which caster wheels 20 arecarried for facilitating the movement of the unit from one place toanother.

Mounted centrally upon the main frame 12 is an electric motor 22 havinga drive shaft a pair of pulleys 24, one at each end, selectivelycontrolled by a manually operated clutch assembly 26 for selectivelydriving one or the other thereof, as may be required.

The base 28 of a drill press 30 is integrally connected to a mountingplate 32, as is more clearly shown in Figures 5 and 6, which ispivotally supported by the main frame for selective movement between anoperative and an inoperative storage position. A bearing plate 34 nitedStates Patent 0 Eatented Feb. 2, 1960 rotatably engages atr ansverselyextending pivot shaft 36 that is connected at one end to one extremityof an angle bracket 38 which is pivotally supported at its opposite endto the lowermost end of a hanger pivot shaft 40, which pivot shaft isintegrally connected to the main frame 12 beneath the level of the tabletop 42. A bearing post 44 also connected to the mounting plate 32rotatably supports a pulley shaft and associated pulleys 46 around whichpulley belts 50, 48 are trained for effectively transmitting power fromthe motor 22 to the head of the drill press, as may be required. Anangle brace 52 having cutouts 54 atopposite ends serves as a mainsupport stay for the drill press in the operative position illustratedin Figure 1. As is more clearly shown in Figures 3 and 7 of the drawing,the lower end of the brace 52 is engaged with a stud 56 on theunderframe, while the opposite upper end thereof is engaged by the outermost end of the transversely extending pivot shaft 36, between the headthereof and the bearing plate 34. However, in response to removal of thebrace 52, the drill press 30 may be first rotated about the transverselyextending shaft 36 to a horizontal position, and then rotated as a unitabout the vertical longitudinal axis of the vertical pivot shaft 40 intoa storage position beneath the top 42 of the unit, as shown in Figure 4.

The top 42 is hingedly carried upon the main frame 12 'by means of hingeassemblies '58 for selective movement between a normally horizontal andan open angular position, such as shown in Figure 2. Raising the top 42provides access to a circular saw assembly 60 in which the blade 66 isrotatably supported upon a shaft 64 carried by the main frame 12 andwhich is driven by a pulley 62 from. a belt 50 that is trained about oneof the drive pulleys 24 on the motor shaft. The top 42 may be raised toreplace or adjust the saw blade 66. In the event that it is desired touse the apparatus as a disc sander, the saw blade 66 is replaced with acircular sanding wheel, in a manner well known to those skilled in theart. When in use as a saw, the blade '66 projects upwardly through anelongated slot 68 in the top 42, as shown in Figure 2. A miter gaugeassembly 70 is adjustably supported within a transversely extendingguide channel 72 for use with the disc sander and saw blade, as may berequired.

Adjacent to the motor 22, a compressor 74 is mounted and driven by apulley belt 76 from a pulley wheel carried by the motor drive shaft.This compressor 74 is operative to compress air and store it within acompressed air storage tank 78 having an outlet valve '80 for supplyingair under pressure to a spray gun 82 that may be used in variouspainting operations.

It will now be appreciated that a complete work shop is provided upon asingle main frame for movement between various working locations, suchwork shop providing for a drill press, circular saw, sander, and sourceof pressurized air for spray painting purposes. A manually operatedswitch 84 enables the unit to be conveniently energized and deenergized,for safety purposes.

While various changes may be made in the detail construction, it shallbe understood that such changes shall be within the spirit and scope ofthe present invention as. defined by the appended claims.

What I claim as new and desire to protect by Letters Patent of theUnited States is:

l. A portable combination power tool comprising a main frame, wheelsrollably supporting said main frame upon a surface, motive power meanscarried by said main frame, tool means carried by said main frame, powertransmission means selectively drivingly connecting said motive powermeans to said tool means, said tool means including a drill press, abracket pivotally supporting said drill press upon said main frame forselective movement between an upright operative position and a collapsedstorage position, said bracket comprising a mounting plate integral withsaid drill press, a vertical pivot shaft depending from said main frame,a transversely extending pivot shaft carried by said mounting plate, andan angle bracket pivotally connected at opposite ends to the lower endof said vertical pivot shaft and one end of said transversely extendingpivot shaft.

2. The combination according to claim 1, wherein said transverselyextending pivot shaft supports said mounting plate for rotation about ahorizontal axis, andsaid vertical pivot shaft supports said mountingplate for rotation about a vertical axis.

3. The combination according to claim 2, wherein said motive power meanscomprises an electric motor having a drive shaft and integral drivepulley, and a manually operated clutch acting between said drive shaftand said drive pulley.

4. The combination according to claim 3, further comprising a brace barselectively engageable at opposite ends with said transversely extendingpivot shaft and said main frame releasably securing said mounting plateagainst rotation about said horizontal and vertical axes.

UNITED STATES PATENTS References Cited in the file of this patent1,870,774 Gaines Aug. 9, 1932 2,505,658 Wilson Apr. 25, 1950 2,662,566Kurschner Dec. 15, 1953 2,784,752 Emrick Mar. 12, 1957 2,835,289Rockwell May 20, 1958 FOREIGN PATENTS 45,934 Germany Jan. 23, 1889 3,870Great Britain Feb. 18, 1903 of 1903 a

